Effect of imperfect channel estimation in I/Q imbalanced OFDM system

Authors:
Udesh Oruthota;Olav Tirkkonen
Affiliations:
Aalto University School of Science and Technology, Aalto, Finland;Aalto University School of Science and Technology, Aalto, Finland
Venue:
Proceedings of the 6th International Wireless Communications and Mobile Computing Conference
Year:
2010

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Abstract

We investigate the effect of Least Squares channel estimation on an OFDM system with I/Q imbalance. A pilot structure removing the errors caused by I/Q imbalance from the channel estimate is considered. Based on these assumption, we evaluate the symbol error rate (SER) of M-QAM modulation in a Rayleigh fading channel in closed form.